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John Henry Newman, The idea of a university defined and illustrated, Discourse V ("General knowledge viewed as one philosophy"), ed. I. T. Ker (Oxford: The Clarendon Press, 1976), 433-434 (Appendix I). The headline is from p. 430, and is similar to this one from p. 429.
Newman says "men", but means "bodies of men". Having just allowed for an authentic approach on the part of the rare non-Catholic individual, he has here returned to his main thesis, which has "to do with systems, institutions, bodies of men" (432).
Needless to say, the same point could be made from the Protestant (or any other) angle. How often do Protestants, too, say, upon the conversion of a friend to Catholicism, that they had seen it coming years before? Nor would Newman disagree. So far as I can tell, he would be the first to admit that Protestantism, too, is a kind of self-consistent (albeit in his view heretical) seed. Catholics,too, "may grow into an idea by degrees, and then at the end they are moving on the same line, as they were at the beginning, not a different one, though they may during the progress have changed their external profession" for a Protestant one (431).